1103320220021 has 4 divisors (see below), whose sum is σ = 1168221409452. Its totient is φ = 1038419030592.

The previous prime is 1103320220003. The next prime is 1103320220033. The reversal of 1103320220021 is 1200220233011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 313052559121 + 790267660900 = 559511^2 + 888970^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1103320220021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 64901189413 = 1103320220021 / (1 + 1 + 0 + 3 + 3 + 2 + 0 + 2 + 2 + 0 + 0 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1103320222021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32450594690 + ... + 32450594723.

It is an arithmetic number, because the mean of its divisors is an integer number (292055352363).

Almost surely, 2^{1103320220021} is an apocalyptic number.

It is an amenable number.

1103320220021 is a deficient number, since it is larger than the sum of its proper divisors (64901189431).

1103320220021 is an equidigital number, since it uses as much as digits as its factorization.

1103320220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64901189430.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 1103320220021 its reverse (1200220233011), we get a palindrome (2303540453032).

The spelling of 1103320220021 in words is "one trillion, one hundred three billion, three hundred twenty million, two hundred twenty thousand, twenty-one".